CN103047221A - Double-acting air-suspending friction-free air cylinder - Google Patents
Double-acting air-suspending friction-free air cylinder Download PDFInfo
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- CN103047221A CN103047221A CN2012105950105A CN201210595010A CN103047221A CN 103047221 A CN103047221 A CN 103047221A CN 2012105950105 A CN2012105950105 A CN 2012105950105A CN 201210595010 A CN201210595010 A CN 201210595010A CN 103047221 A CN103047221 A CN 103047221A
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Abstract
A double-acting air-suspending friction-free air cylinder comprises a cylinder barrel, a piston, a piston rod, a front end cover and a rear end cover, first blind holes axially punched from one end face of the piston form first air inlet holes, second blind holes radially punched from the piston wall are communicated with the first air inlet holes so as to form first throttling holes, third blind holes axially punched from the other end face of the piston form second air inlet holes, the second air inlet holes and the first air inlet holes on the other end face of the piston form included angles but are not communicated, fourth blind holes radially punched from the piston wall are communicated with the second air inlet holes to form second throttling holes, a circumferential groove is arranged on the middle circumferential surface of the piston and is internally punched along the radial direction of the piston to be led to the circle center so that pressure relief grooves are formed, the pressure relief grooves are uniformly distributed along the circumference direction and are communicated with the first air inlet holes, the second air inlet holes, the first throttling holes and the second throttling holes, and one end, connected with the piston rod, of the piston is punched along the axial center so to be communicated with the pressure relief grooves. The air cylinder achieves air supply by a high-pressure chamber thereof, and an air film is unaffected by high pressure.
Description
Technical field
The present invention relates to a kind of floating cylinder.
Background technique
Common cylinder adopts mechanical seal usually, has contact friction force between cylinder barrel and the piston.
Traditional low rubbing cylinder relies on and improves machining accuracy, adopts special low-friction material or grease lubrication to reduce friction, but have processing difficulties, cost is high, difficult in maintenance and the life-span lacks defective; Perhaps by improving seal form, reduce frictional force, be applied to cylinder such as the special sealing technique of German FESTO company's employing, adopt the one-way sealing seal, have very little resistance of taxing.Japan SMC company adopts ball guide sleeve technology and Gap Sealing Technology, this low rubbing cylinder at the uniform velocity property, high low pressure friction, tell and high frequency aspect all have breakthrough, yet there are too some defectives, such as to Load Sensitive radially, complex structure, manufacturing difficulty are large, expensive.
For satisfying the requirement of the aspects such as ultraprecise constant force output control, minute-pressure action control, the gas lubrication technology is realizing that zero friction cylinder is applied.As number of patent application be 201120080863.6 " a kind of with air-bearing without the friction cylinder " just announced a kind of according to the air supporting principle design without the friction cylinder, leave minimum gap between cylinder barrel and the piston, the throttle orifice of even cloth is set at piston radial, piston rod by hollow and flexible pipe are the piston air feed in the cylinder, and connect so that can bear certain radial load and seizure of piston not occur in cylinder without the friction cylinder by ball pivot.But the plenum system by hollow piston rod and flexible pipe is complicated, assembling is loaded down with trivial details, easy care not, afterwards to being optimized without the friction cylinder, pressurized air in employing cylinder self cavity volume is as oiling agent, gas is introduced in the gap, make piston in cylinder, be in complete state of suspension, piston do not contact each other with cylinder barrel, thereby eliminated the frictional force between the piston and cylinder barrel in the air cylinder structure.But, no matter adopt which kind of plenum system, owing to leave the gap between piston and the cylinder barrel, there is very large draught head between the hyperbaric chamber of cylinder and the low-pressure cavity, thereby between the gap, can form air pressure stream, directly affect the air pressure film that piston forms in the gap by throttle orifice, on the other hand, the film formed prerequisite of gas is to have certain draught head in the gap, and raise near the gap air pressure of hyperbaric chamber one end, cause air-film thickness, pressure distribution inhomogeneous, this stability, precision, bearing capacity without the friction cylinder has all been caused impact.
Summary of the invention
The deficiency that has frictional force in order to overcome traditional cylinder, solve that air supporting is difficult without friction cylinder air feed, air film forms unsettled shortcoming, the invention provides a kind of adopt cylinder self hyperbaric chamber air feed, air film is not subjected to the double-action gas suspension of affected by high without the friction cylinder.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of double-action gas suspension is without the friction cylinder, comprise cylinder barrel, piston, piston rod, front cover and rear end cover, described piston rod is connected with piston, there is the gap between described piston and cylinder barrel, described front cover is installed in the front end of cylinder barrel, described rear end cover is installed in the rear end of cylinder barrel, on the described rear end cover air inlet/outlet is arranged, described piston is in axial direction made a call to the first blind hole from an end face and is formed the first inlet hole, described the first inlet hole is circumferentially uniform along piston, radially make a call to the second blind hole from piston wall again and be communicated with formation first segment discharge orifice with described the first inlet hole, described first segment discharge orifice has two groups and symmetrical at least at the piston axial direction; Described piston is axially made a call to the 3rd blind hole and is formed the second inlet hole from the other end, described the second inlet hole forms angle with the suction port of piston other end and does not communicate, radially make a call to the 4th blind hole from piston wall again and be communicated with formation second section discharge orifice with described the second inlet hole, do not interfere between described second section discharge orifice and the first segment discharge orifice, described second section discharge orifice has two groups and symmetrical at least at the piston axial direction; On the circumferential surface of described piston middle part a circle groove is arranged, in groove, lead to center of circle formation pressure relief groove along the punching of piston radial direction, described pressure relief groove is along the circumferential direction uniform and do not communicate with the first inlet hole, the second inlet hole, first segment discharge orifice and second section discharge orifice, described piston rod vertically center is got through the hole, and the end that described piston is connected with piston rod vertically central punch is communicated with pressure relief groove.
Further, gas suspension is single rod piston or two rod piston without the friction cylinder.
Beneficial effect of the present invention is mainly manifested in: utilize pressurized air in cylinder self cavity volume as oiling agent, but piston is bidirectional-movement under the gas effect, all the time there is stable air film in piston and the cylinder surface, all there are pneumatically supported inlet hole and corresponding throttle orifice in the piston two ends, hyperbaric chamber air feed during by cylinder operation, and the inlet hole at two ends has a certain degree and does not mutually interfere, the middle part has gas pressure relief slot, gas pressure relief slot is communicated with external atmosphere pressure by the through hole in the piston rod, all the time guarantee to have pressure gradient between throttling piston hole and the gas pressure relief slot, even piston identical formation that also can not affect piston and cylinder barrel gap air film of the pressure in two chambeies about the moment when the varying motion direction.
Description of drawings
Fig. 1 is that the double-action gas suspension is without the schematic representation of friction cylinder.
Fig. 2 is the tomograph of piston.
Fig. 3 is piston structure figure.
Fig. 4 is the A-A sectional view of Fig. 3.
Fig. 5 is the B-B sectional view of Fig. 3.
Fig. 6 is the C-C sectional view of Fig. 3.
Fig. 7 is the D-D sectional view of Fig. 3.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
With reference to Fig. 1～Fig. 7, a kind of double-action gas suspension is without the friction cylinder, comprise cylinder barrel 3, piston 4, piston rod 10, front cover 13 and rear end cover 1, described piston rod 10 is connected with piston 4, there are gap 9 in 3 of described piston 4 and cylinder barrels, described front cover 13 is installed in the front end of cylinder barrel 3, described rear end cover 1 is installed in the rear end of cylinder barrel 3, on the described rear end cover 1 air inlet/outlet 2 is arranged, on the described end cap 13 air inlet/outlet 12 is arranged, described piston 4 is in axial direction made a call to the first blind hole from an end face and is formed the first inlet hole 6, described the first inlet hole 6 is circumferentially uniform along piston, radially make a call to the second blind hole from piston wall again and be communicated with formation first segment discharge orifice 5 with described the first inlet hole, described first segment discharge orifice 5 has two groups and symmetrical at least at the piston axial direction; Described piston is axially made a call to the 3rd blind hole and is formed the second inlet hole 15 from the other end, described the second inlet hole 15 has a certain degree and does not communicate with the first inlet hole 6 shapes of piston other end, radially make a call to the 4th blind hole from piston wall again and be communicated with formation second section discharge orifice 14 with described the second inlet hole 15, described second section discharge orifice 14 and piston are not interfered between the first segment discharge orifice 5 of other end formation, and described second section discharge orifice 14 has two groups and symmetrical at least at the piston axial direction; On the circumferential surface of described piston middle part a circle groove 7 is arranged, in groove, lead to center of circle formation pressure relief groove 16 along the punching of piston radial direction, described pressure relief groove 16 is along the circumferential direction uniform and do not communicate with the first inlet hole 6 and the second inlet hole 15, first segment discharge orifice 5 and second section discharge orifice 14, described piston rod 10 vertically center is got through hole 11, and the end that described piston is connected with piston rod vertically central punch 8 is communicated with pressure relief groove 16.
Described double-action gas suspension can be that single rod piston also can be two rod pistons without the friction cylinder.
Above-mentioned example is used for explaining the present invention, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, the present invention is made any modification and change, all falls into protection scope of the present invention.
Claims (2)
1. a double-action gas suspension is without the friction cylinder, comprise cylinder barrel, piston, piston rod, front cover and rear end cover, described piston rod is connected with piston, there is the gap between described piston and cylinder barrel, described front cover is installed in the front end of cylinder barrel, described rear end cover is installed in the rear end of cylinder barrel, on the described rear end cover air inlet/outlet is arranged, it is characterized in that: described piston is in axial direction made a call to the first blind hole from an end face and is formed the first inlet hole, described the first inlet hole is circumferentially uniform along piston, radially make a call to the second blind hole from piston wall again and be communicated with formation first segment discharge orifice with described the first inlet hole, described first segment discharge orifice has two groups and symmetrical at least at the piston axial direction; Described piston is axially made a call to the 3rd blind hole and is formed the second inlet hole from the other end, described the second inlet hole forms angle with the suction port of piston other end and does not communicate, radially make a call to the 4th blind hole from piston wall again and be communicated with formation second section discharge orifice with described the second inlet hole, do not interfere between described second section discharge orifice and the first segment discharge orifice, described second section discharge orifice has two groups and symmetrical at least at the piston axial direction; On the circumferential surface of described piston middle part a circle groove is arranged, in groove, lead to center of circle formation pressure relief groove along the punching of piston radial direction, described pressure relief groove is along the circumferential direction uniform and do not communicate with the first inlet hole, the second inlet hole, first segment discharge orifice and second section discharge orifice, described piston rod vertically center is got through the hole, and the end that described piston is connected with piston rod vertically central punch is communicated with pressure relief groove.
2. the double-action gas suspension is characterized in that without the friction cylinder as claimed in claim 1: gas suspension is single rod piston or two rod piston without the friction cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210595010.5A CN103047221B (en) | 2012-12-31 | 2012-12-31 | Double-action gas suspension is without friction cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210595010.5A CN103047221B (en) | 2012-12-31 | 2012-12-31 | Double-action gas suspension is without friction cylinder |
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| CN103047221A true CN103047221A (en) | 2013-04-17 |
| CN103047221B CN103047221B (en) | 2015-12-30 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511391A (en) * | 2013-10-18 | 2014-01-15 | 浙江工业大学 | Constant force output air floating device with air storage sleeve |
| CN103527570A (en) * | 2013-10-23 | 2014-01-22 | 浙江工商大学 | High-precision constant force-output air floatation device |
| CN103527553A (en) * | 2013-10-18 | 2014-01-22 | 浙江工业大学 | Bi-directional constant force output air floating device |
| CN104806584A (en) * | 2015-04-20 | 2015-07-29 | 广东工业大学 | Frictionless quick-response balance system |
| CN106246634A (en) * | 2016-08-12 | 2016-12-21 | 哈尔滨工业大学 | A kind of air-float zero-friction air cylinder of dual-piston structure |
| CN106870507A (en) * | 2017-04-26 | 2017-06-20 | 四川森洁燃气设备有限公司 | Can anti-polarization cylinder dynamic structure |
| CN107131172A (en) * | 2017-06-04 | 2017-09-05 | 珠海市运泰利自动化设备有限公司 | The new type power structure of equilibrium principle is interlocked based on air |
| CN107830008A (en) * | 2017-11-29 | 2018-03-23 | 江苏大学 | A kind of general double acting air supporting friction-free air cylinder |
| CN113700697A (en) * | 2021-08-25 | 2021-11-26 | 江苏大学 | Friction adjustable cylinder based on vacuum generator |
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| US4932313A (en) * | 1988-09-30 | 1990-06-12 | Gutknecht William H | Air bearing piston and cylinder assembly |
| CN102221025A (en) * | 2011-07-18 | 2011-10-19 | 浙江亿太诺气动科技有限公司 | Air floating type friction-free cylinder |
| CN202056133U (en) * | 2011-03-24 | 2011-11-30 | 浙江大学 | Frictionless air cylinder with air flotation bearing |
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| CN203051292U (en) * | 2012-12-31 | 2013-07-10 | 浙江工业大学 | Double-acting air-suspending zero-friction air cylinder |
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2012
- 2012-12-31 CN CN201210595010.5A patent/CN103047221B/en active Active
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| US4932313A (en) * | 1988-09-30 | 1990-06-12 | Gutknecht William H | Air bearing piston and cylinder assembly |
| CN202056133U (en) * | 2011-03-24 | 2011-11-30 | 浙江大学 | Frictionless air cylinder with air flotation bearing |
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| 路波: "零重力环境模拟气动悬挂系统的关键技术研究", 《中国博士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527553A (en) * | 2013-10-18 | 2014-01-22 | 浙江工业大学 | Bi-directional constant force output air floating device |
| CN103511391B (en) * | 2013-10-18 | 2015-12-30 | 浙江工业大学 | A kind of constant force with gas storage jacket exports air-floating apparatus |
| CN103527553B (en) * | 2013-10-18 | 2016-09-28 | 浙江工业大学 | Two-way constant force output air floating device |
| CN103511391A (en) * | 2013-10-18 | 2014-01-15 | 浙江工业大学 | Constant force output air floating device with air storage sleeve |
| CN103527570A (en) * | 2013-10-23 | 2014-01-22 | 浙江工商大学 | High-precision constant force-output air floatation device |
| CN104806584B (en) * | 2015-04-20 | 2017-02-01 | 广东工业大学 | Frictionless quick-response balance system |
| CN104806584A (en) * | 2015-04-20 | 2015-07-29 | 广东工业大学 | Frictionless quick-response balance system |
| CN106246634A (en) * | 2016-08-12 | 2016-12-21 | 哈尔滨工业大学 | A kind of air-float zero-friction air cylinder of dual-piston structure |
| CN106870507A (en) * | 2017-04-26 | 2017-06-20 | 四川森洁燃气设备有限公司 | Can anti-polarization cylinder dynamic structure |
| CN107131172A (en) * | 2017-06-04 | 2017-09-05 | 珠海市运泰利自动化设备有限公司 | The new type power structure of equilibrium principle is interlocked based on air |
| CN107131172B (en) * | 2017-06-04 | 2019-02-12 | 珠海市运泰利自动化设备有限公司 | New type power structure based on air interlocking equilibrium principle |
| CN107830008A (en) * | 2017-11-29 | 2018-03-23 | 江苏大学 | A kind of general double acting air supporting friction-free air cylinder |
| CN107830008B (en) * | 2017-11-29 | 2023-09-26 | 江苏大学 | Universal double-acting air-floatation friction-free cylinder |
| CN113700697A (en) * | 2021-08-25 | 2021-11-26 | 江苏大学 | Friction adjustable cylinder based on vacuum generator |
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| CN103047221B (en) | 2015-12-30 |
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| C06 | Publication | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: Hangzhou City, Zhejiang province 310014 City Zhaohui District Six Patentee after: Zhejiang University of Technology Address before: 310014 Chao Wang Road, Xiacheng City, Hangzhou, Zhejiang Province, No. 18 Patentee before: Zhejiang University of Technology |
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| TR01 | Transfer of patent right |
Effective date of registration: 20181221 Address after: 401320 Jinzhu Industrial Park, Yudong Fenghua Road, Banan District, Chongqing Patentee after: CHONGQING SHUANGSHI MOTORCYCLE MANUFACTURING CO., LTD. Address before: Hangzhou City, Zhejiang province 310014 City Zhaohui District Six Patentee before: Zhejiang University of Technology |
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| TR01 | Transfer of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Double acting air suspension frictionless cylinder Effective date of registration: 20210624 Granted publication date: 20151230 Pledgee: Chongqing Rural Commercial Bank Co.,Ltd. Nan'an sub branch Pledgor: CHONGQING SHUANGSHI MOTORCYCLE MANUFACTURING Co.,Ltd. Registration number: Y2021500000026 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |